While playing the game, hold L1 + R1 and press Up, Left, X, Left, X, Down, Right, Circle, Right, Circle. If you entered the code correctly, you will hear a sound. The game will continue by itself under CPU control.

Alternate game

Successfully complete the game, then load the saved game file and select any level. Game play will begin with new routes at a harder difficulty setting.

Fiery Ulala

Achieve a rank of 95% or higher to play as Ulala surrounded by purple fire.

Michael Jackson cameo

Michael Jackson can be found in the last level of the game.

Defeating the second-to-last Boss

When facing the Boss that makes you copy its moves in reverse, simply turn your controller upside-down -- you will not have to think the reversed commands.

Alternate costumes

Successfully complete the following tasks to unlock the corresponding alternate costume: